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V6 engine misfire

My dad has a 1994 Nissan D21 that misfires going uphill at around 3000 rpm. He wanted me to ask the internet about the problem. Already tried: Changing plugs & wires, using injector cleaner. Theories: Catalytic converter or distributor. Any ideas? Thanks for reading

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  • Nissan Master
  • 5,628 Answers

Next is distributor.Wire and plugs you did right thing.

Posted on May 01, 2013

6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: My 1993 Nissan Sentra GXE

Have you checked your MAF? Sentra's are famous for them having problems, I havent had an issue with mine yet thank god.

Posted on Oct 03, 2008

  • 2 Answers

SOURCE: 1997 dodge ram 1500 v6,i have a misfire,ive changed plugs,wires,distributor cap,rotor cap,fuel pump,rollover valve,coil,still has a miss

you can try changing the ignition coil, I own a 97 Dodge 1500 and mine did the same and thats what i had to do.

Posted on Oct 08, 2008

Big Poppa Ma
  • 302 Answers

SOURCE: Check engine light on

There are three kinds of gasoline engine misfire scenarios, first there is the "under load" misfire and there is the "at engine idle" misfire, and finally there is misfire continuously. All engine misfires exist because one of three things has occurred. First, a cylinder has lost compression, a cylinder needs a certain amount of compression to operate correctly. Second, the ignition system has failed or is failing intermittently, spark is needed at the time of compression to ignite the fuel air mixture. Third, the fuel air mixture is incorrect, proper mixture is needed for the ignition system to ignite fuel properly. If any of these conditions occur in the engine, the engine will misfire.
1. Low or no compression can be caused by

a. burned or leaking intake or exhaust valves
b. worn or broken piston or piston rings
c. worn out camshaft
d. wrong weight motor oil was installed holding the cam followers from adjusting
e. broken valve spring
f. failed head gasket.
2. Ignition system has failed or is failing
a. spark plug has fouled or is worn out
b. ignition coil
has failed
c. spark plug wires have shorted
e. engine control module coil driver has failed
3. Fuel/Air Mixture is incorrect
a. vacuum leak at the intake manifold
b. fuel injector has failed
c. EGR valve is stuck open
d. mass air flow sensor has failed
e. oxygen sensor has failed
f. air intake boot is cracked

common problems:
1. fuel injector has failed or is failing
2. spark plug wire has shorted
3. spark plug is worn out or is cracked
4. ignition coil has failed is failing

Testing a coil on the car is pretty easy. No special tools are required. Just remember to be careful, the amount of electricity generated by your ignition system can be dangerous. If your coil is already off the car, or if you would like a more specific data-driven test, you can bench test your coil. To set up the test, remove one spark plug wire from its plug, then remove the spark plug using a spark plug socket. Next put the spark plug back into the spark plug wire. Be careful not to let anything drop into the empty spark plug hole -- very bad.

Posted on Dec 07, 2008

  • 3 Answers

SOURCE: check engine light 2004 GMC Yukon

When my check engine light went on, it was a oxygen sensor

Posted on Jan 15, 2009

MrScary66613
  • 1990 Answers

SOURCE: 99 toyota check eng.lt on code po300,po303,po305,po171,p0420

Hey Dan, It cannot hurt to change the Plugs and wires. Make sure and Check all the Fuses and Relays also. Sometimes the Realays can blow or just get old and send a Code also.

Posted on Jan 23, 2009

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For engine misfiring problem check the help links mentioned below. Click the link below to go through the troubleshooting procedure :---- Engine misses and truck jumps? Hard to down shift? Issue with high gear only? http://technoanswers.blogspot.in/2012/02/engine-miss-and-truck-jumps-hard-to.html

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http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

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http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html
Engine Misfire codes?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html

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Misfire on cylinder 4?

http://schematicsdiagram.blogspot.com/2011/12/misfire-on-cylinder-4.html

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http://technoanswers.blogspot.in/2012/02/oil-on-spark-plugs-and-car-misfires.html

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This will help.

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